For those who are looking for a more economic solution, a range of simple straight oleo legs is available, in a specific range of lengths and diameters.  They are also sprung and damped.

They are available in nominal diameters of 13, 16 and 19mm and lengths in multiples of 10mm (top to axle centre).

Notes:

1. Special lengths can be made but are charged extra.
2. The oleos will accept larger top hole sizes subject to strength and attachment limitations.
3. If different hole sizes are required, they should be specified at time of ordering.