Note: I've only mentioned US suppliers, since shipping this stuff would be unreasonable in cost, the OP is in the USA
Sunset valley only does code 250, but they make SS if you get stuck.
Aristo is available new old stock, on the Facebook swap and shop sites and eBay. (best bet for price)
AML was going to make them, or did make them, but you won't find it.
H&R trains use to sell them, but seems they only sell flex track now, this was the excellent TdV, Trefileries des Vosges track, still manufactured but only H&R imported it.
I'd search eBay, or if you want new, you could go code 250 with adapter joiners to the 332.
Greg