You could try to buy a Silitek keyboard (keyboards with SK-xxxx) and see if the caps will fit, though I can make no guarantees. Try to shoot for a newer board (2004 or newer ish, though good luck finding beige/white models) since those caps tend to be slotted for the tabs. There's very good chance they won't fit. Try filing the tabs to see, though again it most likely won't work.
Best bet would be to bring your keyboard to a thrift store like Goodwill (remember to tell the person at the front you walked in with the G110, and you're not intending to donate it so that they won't think you're stealing it). Try to find a white SK-xxxx keyboard there and see if the caps will fit.
Honestly it's probably too much effort. It's a lot easier with certain boards where they had models in both black and white. I'd recommend the old Dell Quietkey RT7D5JTW model - it feels exceptionally good for a rubber dome, and it was made in both black and white versions, though the black version is somewhat uncommon (check Ebay). Also Chicony keyboards (KB-xxxx) with the round stem are good for swapping too, since several were made in both white and black for several different computer OEMs. IBM KB-9930 is a good one that has dual mode USB / PS/2 and came in both white and black versions, plus it has media keys.