Sparse QR Factorization

Does anyone know of a sparse QR decomposition library for the GPU? I have some large but very sparse (<2% non-zero) matrices that I need to perform QR decomposition on. For smaller matrices, I can ignore the sparsity and the dense routines still work fairly quickly. However, for the sizes of matrices I really want to work with, using dense matrices is really not feasible.

Cheers,
Rob