Good 4WD/Diesel Mechanic in Melbourne for Pre-Purchase Check?

I am in the process of buying a Toyota Bushcamper (a Landcruiser Troopcarrier with a high top, converted into a campervan).

One that I am looking at is in Melbourne.

I'd like to get it checked over mechanically by a specialised diesel/4WD mechanic, rather than just by the NRMA/RACV.

I would like a specialised 4WD/diesel mechanic to do the check, as I assume they would know more about 4WD's, what problems to look out for, and they can do a compression test on the engine.

Any recommendations for trustworthy 4WD/diesel mechanics that might have a lot of experience with 75-series style Landcruisers to do this sort of pre-purchase mechanical check?

Thanks,
Simon
Canberra