Need a little help please!!!!!

[fast71]

okay I need a little help please!!! My truck org. didnt have door jamb switches so when I got the truck back last year the P.O. had installed a alarm and they put some type of universal switch mounted on the floor near the rear of the cab . so when the door was opened it would set off the alarm. I removed that stupid loud thing but i left the switches and used them to work my dome light.
well one broke today and i cant repair it . I need to know what I could do to rig up a way to make the dome light come on with out doing alot of work. Does anyone know where I might find a switch like this??