Couldn't find the PREVIEWS page for them, but here's an Amazon listing with new art for Saga 2 & 3 in TPB:

www.amazon.com/Usagi-Yojimbo-Saga-2-Second/dp/1506724922

www.amazon.com/Usagi-Yojimbo-Saga-3-Second/dp/1506724930/ref=pd_lpo_14_t_2/146-1970209-1037642?_encoding=UTF8&pd_rd_i=1506724930&pd_rd_r=6fb37db3-c1fe-449c-be42-2b528df2a5d7&pd_rd_w=EDcqX&pd_rd_wg=0trMv&pf_rd_p=a0d6e967-6561-454c-84f8-2ce2c92b79a6&pf_rd_r=MM706PYHTBZD61TTN62M&psc=1&refRID=MM706PYHTBZD61TTN62M