Fluval 90 Litre Lighting Unit- Help Please!

Hi everyone- Could any of you advise a newbie on the lighting unit please? Ive had intermittent problems with the lights since I bought this second hand Fluval- with one light working, one not etc. Opened up the unit today to see that both the starter holders resemble an airfix kit (unbuilt). This would explain all the rattling around I've been hearing from within the unit, and the loose wiring and connections would explain everything else. Trouble is when ive looked on the net to get two more holders/ housings, I cant see anything that resemble mine. could any one offer any help please? TIA Marineboy