Sharp Ace - they are Ace!

[Biker_Bob]

Yep my friend, Never stopped making them Ian, Same build quality but just not exported to the UK anymore unless you know the right people, Col, Target sports.

..and who are the right people may I ask? (PM please if you would).

[Biker_Bob]

In terms of keeping them on the road I've found all the O rings are readily available from the likes of Polymax for pennies each.
The exhaust valves and springs can be had from TR Robb
Inlet valve seats and balls from TR Robb or Knibbs
Pump head O Ring conversions from TR Robb - very good these, the pump head seals are no longer available and the ones from Knibbs aren't right.
BTW I found that blue/silver streak pump head seals can be made to fit with a little fettling.
The only thing I've never been able to fix is the blow off valve in the pump, I've not seen a specific seal for this valve and I've tried O rings with no success. These days I don't buy an Ace unless it's got a functioning blow off valve.
Anything else that goes is a basic fabrication / gunsmith job - although the gate that holds the pellet probe in place is problematic - I had wondered about trying to get a batch laser cut and bent....