I recently bought an 87 CBR600F and the gas cap was super seized so we drilled it out. I bought another from eBay but it did not fit ad since OEM caps are tricky to find, I'm wondering if any caps from different models would fit

 

Welcome to the forum, pop over to the New member area and introduce yourself, we also love pics.

Here is an oem one.

https://www.cmsnl.com/honda-cbr600f-...i_17620mn4007/

The only other model that comes up is:
CBR500F 1987 (H) AUSTRIA
CBR500F 1987 (H) AUSTRIA
CBR500F 1989 (K) AUSTRIA
CBR500F 1989 (K) MEXICO
CBR500F 1990 (L) AUSTRIA
CBR500F 1991 (M) AUSTRIA