Complex sentence: Drawlane's Midland Red North subsidiary did receive a small order for the Leyland based Olympian in 1989 and generally became one of the major bodybuilders for the Olympian when it became a Volvo product in the mid 1990's.
Split into simpler sentences: Drawlane's Midland Red North subsidiary did receive a small order for the Leyland based Olympian in 1989. East Lancs generally became one of the principal bodybuilders for the Olympian after it became a Volvo product in the mid 1990's.