Zenith clover leaf

[old_coot88]

If you're referring to the convergence yoke cloverleaf to replace a broken one, there used to be an aftermarket item made expressly for this. It consisted of a bungee band sized to fit around the outside perimeter of the housing, holding the whole thing snugly in place.
No doubt a similar item could be rigged if a replacement cloverleaf is not available.