Im not sure if you guys are aware but optitex main market isn't Daz Studio or even clothing for daz. In fact i dont think you will find Daz mentioned anywhere on there site. I believe the main reason you dont see more optitex dynamic clothing is that optitex doesnt allow a hobbyist priced license for designing/converting the clothing. For a vendor to make this type of clothing they need to purchase software from optitex for around 7000$ a year. Plus i believe you need to purchase additional training modules to learn the apps. 

Optitex is aimed squarely at the top end of town with clients like harley davidson, victoria's secret, Tommy hilfinger...I honestly dont think Daz Studio is even on there radar, Unfortunately.

Have a look at there main site here http://www.optitex.com/