If you are looking for a sintered bronze filter, here is one example:
https://www.ebay.com/i/172761496319
Otherwise, if you just want a small filter, look for a small engine filter for a chainsaw, weedeater, etc... They can be had at most farm supply, chainsaw repair, or home stores.
for example: https://www.google.com/search?newwin...aw+fuel+filter