Congrats on the "officialdom" Alan!
I've often wondered if V5s for Historic class vehicles were printed on a "historic looking paper" but it seems not!
The DVLA are missing a trick there, they could give the option to have it printed on something resembling parchment for a small fee or you could make an unofficial one by scanning then printing using whichever filter (sepia?) gives the impression of age just for the fun of it (obviously not for official use though) as an addition to the RBs history.