well if you will ask bolt on fit then the only option is suzuki gs150se shocks but they will cost an arm and leg, around 15 to 20000. Front shocks are hard to find, i tried for an year and found a brand new pair from Ravi Factory itself for 9000 a pair. Most of the time the issue with shocks of other bikes is the disc brake calliper fittings, wego shocks dob't fit, checked myself. Yes twister shocks will fit as twister is dito copy of Piaggio but none of twister part is available , not even with Road Prince itself.