Mechanic near Herts for AAZ conversion

[Sagemagoo]

Spoke to Brickwerks at Camperjam this weekend re an AAZ conversion and got sent off to collect bits ready for a possible slot in September but on the way home my engine gave up (1.7D) and a very nice man relayed me to North London (much to the amusement of the air cools in the service station..). We've planned the whole of August camping across Europe and this isn't happening unless I can get a recommendation for a suitable mechanic and am lucky with a slot.

Anyone assist?

(PS - watch out for a small oil slick on the M6 between J3 and J3A...)

Thanks

Gordon