Ok, tis tricky but here goes. You will need:
1) Suitable Credit card with low balance transfers for life rate. There are some with around 4.99% at the mo. We shall call this card A.
2) An intermediary card which allows funds to be transferred direct to your bank, pref with no fee - Egg is a good one for this. We shall call this card B.
Now, first you need to do a balance transfer from card A to card B for say the £1500. Card B is then credited with this amount and can be simply transferred into your bank at no cost. You now effectively have yourself a loan for £1500 at a rate of say 4.99%.
You obviously need to make the monthly repayments to card A and this could all fall down as far as the interest being added on top each month, haven't really thought it through that far! lol