Any generic set will work, so long as it will fit any Weaver type base. Take the sight rail off the top of the Spyder and replace the Allen head bolt without the rail. Try to put that screw through the hole in the Sight Rail. Now, drill out the hole just enough for the threaded part of the screw to fit through. Well, Sort of -you still need to drill out the recess so the Big, Fat screw head can fit close to the reciever.
Test fit the sight, but be careful.
If you didn't drill out enough and overtighten the bolt, you will strip the outer part of the threads. I don't suggest using the lockwasher either. If it is successful, that will probably hold. After all is well, mount the scope and mounts as per the instructions. Generally won't get caught on things and doesn't leave a big target.