The AJP ones should fit
https://ajpcustomparts.co.uk/index.php/windicators/

First oil I used was the one referenced on a lot of youtube videos from Crossman https://www.crosman.com/product/crosman-pellgun-oil/ downside is that tube is really small although saying that it lasted me the year and around 45 fills and the required maintenance/purge cycles. When I went looking a ...

I have the Nomad II compressor bought at beginning of lockdown last year from Opticswarehouse. Works really well for filling the rifles, simple to use and maintain, not too noisy when working either. Looking at the log spread sheet I keep looks like I am normally filling my rifles from about 100 bar...

You dont have your location set so he may not be "local" to you. I had a S510 US reg'd by Phil at The Rat Works https://www.theratworks.co.uk/

welcome back Pete I will update my links

Pete moved all his videos to Vimeo

Part availability (or lack of) in these COVID times

I spent hours last year looking for a solution for this that did not involved butchering a TX to do.. google threw up one post in another forum claiming a possible solution, however it was (back then) from 3 or 4 years ago and the guy had never posted details or pics despite many folk asking

Good starting point is Air Arms Anorak web site

https://www.airarmsanorak.co.uk/air-arms-shamal

Also if you call or email Air Arms with serial number they will help