go to animalpaintball.com they have the Silver Glads in stock and they might have the Sonic ASAs which fits nicely with the Glads. You might want to get a nicer trigger. Get the Ripper http://www.cnc-machining.com/ripper/
or the PowerLyte www.powerlyte.com.
MacDev just came out with theirs www.macdev.net
these are all complete frame and trigger replacements. Check out www.obdo.net
tank's site to see the trigger that are available