You could get roktabs to work with the K2 component. A hint, get the product snap shot (vm function found in ps_product class) from virtuemart and make it an item in K2. For example the following line:
" {product_snapshot_feature:id=80,showname=y,showimage=y,showprice=y,showdesc=n,showaddtocart=n,displayeach=h,displaylist=v,width=90%,border=0,style=color:black;,align=left}
"
will display product name, image and price within roktab. You'll also need to get the roktab module to read from K2 instead of joomla.