Hi and a very warm welcome to the forum.
Pleaes take a look at
www.iva.com for a list of companies and their IP's, read some reviews and contact at least 2-3 companies, you will get free impartial advice tailored to your situation and hopefully they will help you move forward.
Normally the equity release happens in the 4th year of your IVA and a lot of proposals state that if you can't release 85% LTV an extra amount will be payable by extending the term of the IVA by 12 months. Each IVA is individual and therefore all our conditions are different to. There are obviously some common ones but there is always exceptions to every rule.
I hope you find the correct solution for you and I do know the professionals who post on this site come highly recommended but do take a look at the link above and hopefully you'll get advice specific to you to enable you to move forward, do let us know how you get on?
I doubt after 4 years of paying into an IVA it would be beneficial for anyone to be forced into bankruptcy, one of the professionals will be along shortly to comment on this.
IVA final payment left the bank on the 26th January 2013...looking forward to a debt free future.