Portable compressors

2 questions please. #1) I have an Hatsan Spark the fans went but compressor works fine the fans are available but hard to access (China) any one know of a mod that will cool the compressor? Like a fan mounted on top or anything? 2) I also have a Benjamin Travel on first use, you can tell it’s better quality in so many ways, seems like the $125 difference is obvious how often should you change the paper filter? I do have another Chinese gizmo air/water separating mounted straight up on the wall where I do my fills, so a little new to all this is a paper one even necessary? I have the a/w cartridges that have water absorption and oil absorption with charcoal. Any help would be appreciated thanks

Mod edit: removed political comments 
 
Thanks for taking the time. Yes, nothing on Amazon although some came close as not big enough or to big. Hatsan I think designed this whole compressor to the fan size, b/c they are very hard to find, unless I’m not looking them up right, which I think I am. I have no experience in re-building CPU’s which all these small compressor are similar to as far as cooling goes.
 
Thanks man, you are so informative all the time! Problem is that the company Walmart had second and believe it or not a third party! I found that out the hard way. Then finally you end up calling to an answering machine, then all of a sudden, their telling me to send it back! After countless emails and calling! Finally Walmart reimbursement my money back. I do not trust this second and third party crap, it’s bogus business! So fixing it myself with the help of a computer shop! After you take the hoods off these things, that’s what’s under it, same cpu fans just a compressor instead of a computer! Ppl have to watch out for even if it says Walmart you have to see whose doing the packaging and shipping! That’s the company who your dealing with!
 
Yes I did! Despite a lot of frustration! It wasn’t as simple as getting my money back and keeping a working compressor! There were quite a few phone calls made, quite a bit of run around, and total bad business. It’s at a cpu shop. If you know about them and I’m sure you do they got the same fans in there I just found 2 on Amazon that are the same dimensions and amps I’ll see if that works. Worse comes to worse I’ll get a small round home fan and use it. I have the Benjamin too, which it’s not to hard to see it’s a better quality even the power supply. Hey you get what you pay for!