On a Darrin, the outer red lens and inner clear lens are the same as 52-53 Kaiser. The housings, however are different. You will hear folks say that you can cut down a 52-53 Kaiser housing to fit a Darrin...don't believe them. It can be done, but it takes alot of work and they still won't be quite right. For the lenses, try Rudy Phillips at 760.789.3608 (morning, pacific time). He might have the housings...or least a lead.