Thicker leggings or treggings

[Dancergirl]

I just bought these based on excellent reviews:

www.marksandspencer.com/M-S-Collection-Pull-On-Treggings/dp/B003XTDD22?ie=UTF8&ref=sr_1_1&nodeId=42966030&sr=1-1&qid=1386858500&pf_rd_r=0QY8NPFPZMG3QE56Q2MC&pf_rd_m=A2BO0OYVBKIQJM&pf_rd_t=301&pf_rd_i=0&pf_rd_p=321381407&pf_rd_s=center-3

They are awful, really baggy.

Where can I get some that are fitted and come in a shorter length?