Team Dynamics, are made by Rimstock, who are still manufacturing in West Bromwich to this day. As for age of them, they could be anything from 10 months, to 10 years old. No way of telling unless you can find batch numbers etc... on them.
I'd recommend some lightweight alloys tbh, reduction in unsprung weight is good all round, the team dynamics pro race 1.2s are my prefered choice, but speedline offer a good range in lighweight alloys too.