Sadly I couldn't get Phoenix link to work..
I've never heard of anybody using an implantable pump in the UK, but doesn't mean that nobody does though..
But I've heard people using Dia ports, where there's been problems with insulin such as allergies with a pump..
The Dia-port is inserted so that it enables insulin to be delivered to as near as possible to it's natural source within the body, this seems to lower the allergy side and amount of insulin needed..
I know Bournemouth diabetic unit has used this method...
So perhaps if you come to a bit of a dead end with an implant, perhaps this will give you an alternative avenue to follow