There are veins made at another company that are on the market now. Not bioengineered.http://www.tayflow.com/
Here is the email I got from them back in February.
Many thanks for your email. We supply ePTFE grafts that have a unique technology which restore natural blood flow. Have you seen our website? www.tayflow.com
If you could let me know where you live, I could put you in touch with the local distributor?