if you need any parts, get in touch with lostin51. he can supply what you need at very reasonable prices.
as for helping him clean up, the place probably hasn't been cleaned up in years and he's too embarrassed to have anyone see it. a very common occurrence when aging children take care of old parents. i'll bet that when it's time for you to have it, he has it right near the door or out on the porch or something. bake him a thank-you cake or cookies or something else homemade. he's sure to appreciate that.