Steve and Gerry have been really useful in helping to source vintage ex-RAF avionics and equipment.
Their core business has historically been marine salvage, they have recently turned their interests to ex-RAF equipment and aircraft parts, and hold quite an impressive stock. Their website details some interesting marine projects they have carried out, and includes some marine items for sale.
They have helped many classic aviation preservation groups locate hard-to-find parts, and have the core values of these restoration & preservation projects at heart, making them very helpful.
A wide range of aviation items are listed in their Ebay Shop.
This usually contains items ranging from cockpit items to sections of airframe.
Their Ebay feedback is consistently 100% positive.
They encourage anyone seeking an illusive part for a classic aviation project to get in touch, as they hold more stock than what is listed on ebay, but also can be looking out on your behalf.
I have found them extremely helpful, especially as they take an interest in trying to help classic aviation projects along, and see the equipment going to a good home where it will be used.