RD 200 DX 1E8

Hi guys , My turn for help.I have a rd engine for rebuild and have a problem with the points rotor.One of the springs on the rotor has decided its not happy doing its job and keeps coming out due to been mishaped.Anyone know if just the springs are available to buy or is a new rotor the only answer ? .I have searched the yambits and wemoto sites etc to no avail.The engine is on its original pistons and having both engine covers off i am amazed at the lack of wear on the engine.Its just very rough in the points department and needs brushes points and a rewire.I dont mind spending a few quid on it as it cost £4.30 on ebay and came with carbs downpipes and coils.(i know what a steal )My plan is to fit it in my ct1 at some point as the ct1 engine is cream crackered and i fancy a project. I have a ts 185 and etz 125 to put in the frame but prefer to keep it yammy.Anyone know where such ignition parts are available.Many thanks .