Land Rover early Defender Bulkhead Ventilation Flap Seal Set (2x Seals) 

MUC4299 / ALR2220

Quality British made Seals with self-adhesive backing, these fit the bulkhead vent flaps rather than the bulkhead

Could also be used to replace Series 2a & 3 OEM reference  330621 & 396139

Fits all 90, 110 & Defender up to TD5