Depending on what sort of fixture you are looking for. I.E Luminaire style or inside the hood you could do alot worse than starting on eBay.
32" is a difficult tank size to find an exact fit so you would more than likely have to move up to the 36" (3foot). Obviously this would only work if you were looking at luminaire's.
I got my Luminaire from eBay for a steal, if you don't mind second hand of course.
Or call into you local Maidenhead Aquatics, pick their brains then go home and find what they recommend on the internet