Hello Donald and welcome.
6.5V, 0.3A, MES lamps used to be ten a penny and not a Philips special in spite of what they'd like you to believe, but they're awkward to get hold of nowadays. Search online and see what you get. 0.15A would be OK too. CPC seem to have them:
http://cpc.farnell.com/lux/6240-99-9...-2w/dp/SC13367
Best caps to use are the MKT1813 series from Vishay-Roederstein. Farnell do them, as do the BVWS if you're a member:
http://www.vishay.com/docs/26013/mkt1813.pdf
http://uk.farnell.com/webapp/wcs/sto...e&pf=110320629
1.6KV sounds a bit extreme. Usually 1kV is ample in this position.
N.