I have those - got ‘em off of Amazon. FYI they are grey but have a distinct blue tone in the right lighting. Good luck with your search. Gum soles ftw!

Here ya go:

https://www.amazon.com/dp/B07894GQLL/ref=cm_sw_r_cp_awdb_imm_t1_9wDbGbY93TV2T?psc=1&vs=1