E-bay, or stores like devon4x4,flatdog ect. Everything is depend on your budget. 4example i use Hella luminators - those are very reliable. Aluminum housing (powder coated), HeavyDuty glass lens... long range light. Not any damages about 4yrs... also i can re-paint it if needed...
But they cost 150 GBP each... so you need to think what do you need and plan your budget
But first of all, before you spent all cash on gadgets... check all the mechanics / drive train. If old and worn VCU kill your IRD and/or diff it will be cost a lot...
P.S
Mine hairdresser wagon is here
:
http://www.landyzone.co.uk/lz/2532256-post11.html
For your inspiration
...
P.S2 - i don't know why locals calls me "Mr.Moneybags"