Whats the smallest available ? Currently got a pair just over 5" but they are a bit crusty, does anyone know of any smaller ones, main/dip/side ?

110mm from either Premier or SVC I think.
They are combined dip & main beam &, I believe, sva compliant.

sva compliant no problem looking for as small as poss mot compliant, any more ?
Locostbuilders surly ain't gonna let me down on this one.

The small diameter 110mm lights are NOT SVA compliant. GTS also supply them.

Phil