Ralt Rt30 looking for info

[stobo]

Chassis number of my RT30 is #612 which I understand was the Swallow Racing car used by Mark Donnelly in 1986 British F3 championship. Car brought to Australia in 1988 and used for 20+ years in Aust F2 configuration.

Am interested in filling in a bit of the early history:
1. Can find info on car in Donnelly's hands for 1986 (source Oldracingcars.com) but in the 2nd half of season no matching chassis number records, was wondering if anyone knows if there was any issue with (crash, upgraded to new chassis, etc), or if its just a case of not being able to confirm the chassis number;
2. Any cluse on who owned / used the car in 1987 before it was sold to Aust.

Any info appreciated.