I have one that is exactly what you are looking for, by Professional Choice. I found it on Ebay for around $40 new. The best part is that the fleece attaches to the girth with a wide strip of velcro, so you can remove it for washing. I have been really happy with it.
Where am I, and what am I doing in this handbasket???
I am now in the market for one of the above mentioned brown on brown fleece girth and that link no longer works. Any other suggestions? I would also consider black on black and woul love it if the elastic also matched. Looking for a 48". And under $50 would be great.
(Hope it's not too much to ask!)