Anyone know of any garages that fit horse box ramp springs - ideally northamptonshire

[BugsyMalone]

Hi im looking at buying some underslung horse box springs for my VW LT35. Currently the ramp is far too heavy for me to lift alone.
Can anyone recommend any garages etc in the northamptonshire or surronding areas to fit the springs?
I have searched google with no luck

Thank you
Sarah