Hi:
Yes there probably is a way to do this but without knowing the model of he TV it is difficult. The best way to find out is to look at the back of the set near the scarts and powerlink sockets and see if you can see a thin elongated (about an inch long) and half a CM in height socket. If so that is master link.
I don't think you can get an external hub although I might be wrong.
You can buy the cards to slot into the TV. However, depending on the age you would have to look for a donor TV; part on eBay; or go to B&O directly.