Catflap problem

[Caspar]

I've got a double glazed back door with glass in the top and solid bottom half with a cat flap in it. The cat flap lets in cold air and i've taped plastic over it to prevent this.
Is there any way of replacing the bottom panel with a new one (without the cat flap) or with another glass panel - can these be bought anywhere or could I obtain one from an old door?. The bottom panel seems to be fitted in the same way as the top glass with a rubber seal around it.
Thanks for your help.

 

[breezer]

ask a local d.glazing co (or 3 ) for a quote

 

[chappers]

they are replaced in exactly the same way as the glass and can be bought from most DG suppliers. It will probably need to bee cut to size though.