I'm such an idiot. lol I searched the entire bottom of the board for R619-R621 before I noticed you said they were on the top.
Anyway, it's R619. I circled it on all three revisions in the attached picture. I think a 0.2A or 0.3A SMD fuse should be the proper replacement if I'm not mistaken. They're not 20A and 30A are they? That seems way too high.
Well assuming they're in the 0.2A-0.3A range, there are some resettable ones on eBay here
Edit: They're 2A and 3A fuses as mentioned by BlueCrab below.