...due to me being a very low hour (just passed) PPL
Maz,
A lot of groups give the low-hour pilot the old excuse of "increased premiums".
Our tailwheel PFA Permit group has, over the last 3 years or so, taken on three new ppl's, each with 50 hours, zero t/w time. The (then) insurers then simply asked for a premium boost of about £25, and a proviso was added that the excess for them (should a claim be made) be doubled for them during their first twenty hours on type. The usual "differences training" applied, of course.
One of the three joined the group even before getting the ppl, but could not fly it until the ppl arrived. The other two like the aircraft so much, they went and bought their own.
You may find that you need to locate a group that would be keen to "take you on" and broach the subject with the broker.
It is the group that makes a group, not the aircraft that makes the group.