VP Autoparts only lists radiators for YM 67-70 140s and 1800s, which have the filler cap in a different place to the ones I'm used to seeing (YM 73 and 74).
The BW35 version is slightly cheaper. These will set you back about $475 USD plus shipping (I checked VP's USA site; the Swedish site may be slightly less expensive in SEK, but then there's shipping from Europe).