have a pair of robart oleo struts that i got second hand with a kit that i bought. these are in box, designed for a gee bee r2. unfortunatly i cant use them, as they are two small for my needs. they take a 3.5 inch wheel , but a narrow wheel. you may have an application to suit. googled these , they are $200 us dollars plus freight, so about $350 au bucks delivered approx.
open to offers as i dont need them. will post at your cost.
have put a picky of the dimensions , but if you have any questions , please ask