Hi Robbo,
The member to contact regarding the catchers is "SB Obsession". Just send a PM to that member and you should be OK as I know his father in law is still making them and has just made one for another member on here.
The Deflector clamp and Screw in that link is about the cheapest you'll get on the open market.
As far as that A/C screw is concerned you'll probably get one from a Lawn mower shop that has been established for many years and has some old machines on hand that they strip parts from to supply the demand that is created by their service clients.
Cheers,
BB.
