Hi,
Put a post like this on the 'Brit's talking about Brit's stuff' thread on the commercial tree care and climbing forum.
I'm loler qualified but I'm in Bermuda so can't help you! NPTC might have a register, try their website???
BTW: to get ahead of the game and save some $$, start by coming up with your own system of marking, make sure every item has a unique number, collect together all your reciepts and certificates of conformities, make sure all your kit has CE marks or is traceable to CE marked product (like prussik loops).
For instance your ID numbers might run something like MP001, MP002 etc.
If you have a computer you can create your own inspection sheet for each item, ID#, description, origin, serial #, CE mark, SWL, MBS, date of purchase, date of installation, then spaces for your 6/12 month inspections and results. Clip your receipts, cert of conf to the inspection sheets.
Good luck and stay on top of the game!