@FastEddie it's a hobby why not design one and share it on Thingiverse.com to help your fellow airgunner? A lot of things we want are not available or way overpriced for some individuals, such is life...
Most of us that will not take PayPal are not trying to screw anyone. When they started sending 1099's they created a lot of extra work for non professional sellers. Additionally there are a lot of unscrupulous buyers that are out to scame you.
#1 make a special place for another suet block. #2 Follow the 3S rules. We can hunt them here 4 days a week unless they are causing trouble then anytime goes. And I haven't found any restrictions on weapons.
My YH came with a regular plug in the oil fill but it also came with a breather cap in the parts bag. You can get the breather caps lots of places, Amazon, Ali, ebay...
The old FX USA was very generous with what they would fix under warranty past the absolute date. I expect you need to contact one of the FX authorized centers to see if they'll look at your problem. Why not ask on AGN. Someone here could tell you how to fix it :)