Am looking at replacement shocks but 300 quid is no laughing matter.

Reckon I may be able to get a local firm to rebuild and respring current shock for a whole lot less..

yup.. and only last a year if your lucky!
i had mine re-done last yr, spent £90 fitted back on bike... lasted less than 10 months!
i am now saving up to get a CBR6 shock off Graeme France + longer dog bone £100-250 i think depending on what type i get.