Hi All, I'm trying to find the TFBS poisition weight matrices for the TFs snail, slug, twist, and smad 4 in humans

None of these are in JASPAR, and I've had no luck with TRANSFAC either. Anyone have any idea where I might be able to get these matrices. Failing the matrices I could calculate them myself in R if I knew the sequences they bind to. If anyone knows of somewhere I could download a whole bunch on known binding sequences for these factors it would be very easy to calculate the motifs and matrices.

Thanks in advance for any help, Cheers, Davy.