I doubt it. Some, though very few, PCP lenders will re-finance but you will also need the agreement of your IP. There is also the question of how the current PCP payments are dealt with in your arrangement: Many are drawn such that, when PCP payments cease, the IVA payments increase accordingly.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk