Beth, the issue with Cosmo travelling for three hours from where he is to you, is that if Penguin and Ginny don't take to him he'd be n the same situation again and would've travelled all that way for it. Difficult, but if the option is "the last ditch attempt" then maybe his chances are better having an adventure!
I know, tis a bit of a lottery, 'specially as he's not been assessed in the same way as a rescue would've been. I know my two would be fine and accept a newcomer, so it'd just be dependant on his personality.
However, there is a space here, which he is more than welcome to fill
i've had a look at the route and i'd be able to go about as far as oxford, (wouldn't be able to go farther than that, partly 'cos i've only been driving for 3 weeks,
and partly 'cos my son wouldn't cope with being in the car longer than that.) so it'd just be maybe 2 other people needed, and i have another forum i can possibly beg for help on if no one from here could do t'other runs.