Oh bloody hell, I can't cope with all this compliment stuff! :o 
TBH, Snort, I dunno. Rescues will normally target a suggestion around the £100 mark but some (and you) might prefer you to make a small standing order each month instead. Gah, I hate talking money, even when it's nowt to do with me!
Okay, back to pooch. I have in mind a possible home following assessment and soforth of pooch (a lady who is loved and trusted in rescue, who has just recently lost her rescued terrier X girl to age and has been looking at the Oldies website, she told us yesterday... ). However, she has grandchildren and a home with lots of visiting family so although she won't take the view that your DH has this may not be the right home for your little girl.
I can happily look to finding her rescue, but if it's further afield you will need to either get her there or hold on to her until I can arrange a chain of transporters to collect and deliver her. That could take until next weekend or so, most of us are at work all week of course. Can't do it myself as I have no transport.
Likewise I WILL find rescue, there is NO doubt about that but as you are learning we are all on our knees with more dogs in need than we have rescue spaces for (this sort of situation is why I get fucked off with backyard breeders... !). So, can you persuade your DH to hang on for a week, maybe, or MUST the dog be out now? If the dog is genuinely at risk I will take her (or if you'd prefer, one of the other ladies can, we'll fight over it :o ) but it would be better for all concerned if we didn't have to of course. That said, if your DH is of the type who would take the dog to the vet for PTS without another word or thought if another trip and snap should occur I would rather the dog was removed now, as I am sure you would.
I'm in the Home County area, about an hour's drive north from Chalfont St Peter, if it helps.