hiya harlequin, i hope you don't mind me messaging you but i thought this might interest you.
i have read the thread about your poorly boa, and have what i think may be useful information for you.
there is a new user on the forum by the name of helenprice, she has for sale a male red tail boa identical to the one jonnymarto was selling at the same time you brought your female from him. she also lives in liverpool, and the bit that makes me think there is a link is that she has stated in her for sale thread that she is into maincoon kittens, (the same breed that jonnymarto was selling some time ago!)
i really hope your boa is well, and continues back to full health, and that you are able to catch up with jonnymarto.
you will notice i have not posted on any forums as yet, ..... for this i have very good reason, (nothing sinister!), but rest assured i am a genuine herpetologist, and animal lover!
good luck and best regards.
paul.