Would vinyl floor covering do it?  There are so many variations on the 'pretty' side you might be able to find something suitable? The underneath is very like a mouse mat and you would be able to buy a small bit of it cheap in most carpet type places.

Not fabric to buy by the metre but what about a sewing machine mat? Woodseats do some large ones.
Or EUFabrics sell varies thickness neoprene, i have used the self adhesive to line the storage lockers on the boat.
website here

Mr BC bought a table protector for using with his guitars (the brown coloured type with thick felt under.....not pretty, but does the job)

@Sew What? Ask if you can see it before buying. If it turns over OK by hand & isn't rusted up then you could oil it up, new needle & it'd probably be ok. I see ads near here for people asking £100 plus for old machines without foot control  my neighbour thought she'd get £150 for hers (after I'd serviced it & paid for PAT test) so I showed her 'sold' listings on eBay. She's now agreed that £45 would be more reasonable! I haven't advertised it yet, still peeved about doing service etc when I thought she was going to start using it again.

They're a good choice for the price - relatively sturdy little machines.


Corduroy is much more needle friendly than it looks. It's tendency to creep along the pile is more of an issue than needle penetration, though using a sturdy jeans needle wouldn't hurt. Its thickness can make it difficult to pin but plastic clips work a treat on it.

#30 is Shun Mark's color code, BTW.  So, researching this, from SM's main company page we get this:

http://www.sl-thread.com/en/products/product_25.html showing T-70, T-90, T-135, T-210, T-270 as weight.  And we know this is the right product, because the other one is poly core, not nylon.

So now, which weight do you have?  Well, another company has the same usage, but they use D Tex system.  (The 150 is weight, the 3 is strands wrapped together).
https://www.amazon.com/Upholstery-Outdoor-Drapery-Beading-Luggage/dp/B01C26BBI4?th=1

In the Q&A they say it's T92...but now Shun Mark doesn't have that, but they do have T90, so you can assume that SM will be in the same range, which leaves you with the T90.

So now you have the Tex, find the needle.
https://www.tolindsewmach.com/thread-chart.html

On that you see a 19/120 for the T92, so you have a needle size.  (18 or 20 is going to be the easier to find, though, but you now have a range of sizes.)

So, what are you sewing?  Canvas?  Outdoor furniture covers?  Marine stuff?  Well...
https://www.sailrite.com/Notions/Sewing-Needles/Sewing-Machine-Needles
And that explains the different types and what you may need to choose from there to find the right needle.

In a tl; dr, researching shows it to likely be T90, needle size 18 or 20 based on fabric and a sharps for general purpose.