Larry,
I did some research a while ago for an SVX owner in Japan. It is possible to fit the UK headlamp washers to a Japanese SVX, so it might be possible to fit them to a US SVX too. (Maybe the fact that your cars are LHD would cause a problem).
This is the information given to me by a dealer in the UK. (Lancasters of Pangbourne
www.lancasterplc.co.uk)
Parts required for headlamp washer modification.
1.TANK HEADLAMP WASHER £38.89+VAT
2.MOTOR & PUMP HLAMP WASHER £85.55+VAT
3.HOSE X2 £7.77+VAT
4.NOZZLE HLAMP WASHERS X 2 £11.95+VAT
5.VALVE £10.85+VAT
6.TANK SCREEN WASHER £48.63+VAT
7.SMALL FIXINGS& CLIPS APPRX £30.00+VAT
8.SWITCH PANEL ASSY £159.00+VAT
Prices are in UK pounds and VAT means 17.5% sales tax)
I was also given the following list of part numbers.
86631pa010 tank headlamp wash
86611pa000 motor headlamp wash
86655pa100 hose headlamp wash x 2
86636pa040 nozzle headlamp wash x 2
786634010 valve
86631pa030 tank screen wash
786621000 motor&pump screen wash
86615pa020 cover wash tank
Phil.