by a company called Performance Alloys in Adelaide, South Australia.
http://www.performancewheels.com.au/alloywheels_classic.asp
They manufacture them with the correct 98PCD for X1/9's.
I have 2 sets of 13" rims on 2 of my X's with 185x60x13's. Both sets of rims had a similar problem. They were not centred on the hub and it took me over 2 years and many futile balances and alignments to discover this. The sterring wheel would shake at anything over modest speeds. Ultimately it was solved by manufacturing a simple plastic ring that sits on the hub and effectively centres the rim.
The 14's will rub on 185x60's or higher profile. They should be ok on a lower profile. Use the tirerack site to calculate the diameter required of 14's to match 185x60x13.
Good Luck
poppa X