I know that this subject has been brought up before, but I came upon this site
metisse.de and found these 'crash bungs' that have a shock absorber built into them, thus reducing the shock load into the frame/engine as standard ones would do, they dont look any different than any of the others on the market and they do have them to fit all Monsters, pricing is around 119 euros so if the linky thingy works, go looksee.
Mmick