can anybody identify this oil pump please?

[Gil Gallad]

it's marked as MIKUNI KOGYO IM-4. after googling it i found one at an aussie breakers yard, but it just says suzuki or kawasaki, but it doesn't say which model. this came with a load of suzuki t250 bits i bought, but it definitely isn't off a t250. also checked t20 and t200, but they are nothing like 
cheers, gil.

oil pump: