[V8] Pentosin crisis

[Acadian Lion]

I need to buy another can of Pentosin CHF 7.1.  It is unobtainable anywhere I am, having tried all the autoparts stores in Maine as well as the dealer.  I even tried ordering a case on Amazon which was at a price per litre not to be believed, only to find that it is out of stock.  

All that is available to me here through the one parts store that has ANY sort of mineral oil based power steering fluid is some stuff made by Bilstein.  I have NO idea if it is fully compatible with CHF 7.1, and draining and refilling the entire system is just out of the question right now.

Any comments?  No one seems to have any CHF 7.1 which is for the older cars like our V8’s.  NAPA Auto Parts here in town tells me they can order it, but do not stock it as they move only one liter a year.  The newer Audi stuff is NOT to be used as mixing the synthetic and original will rot the steering system as you watch.

Has anyone on the list used the Bilstein fluid MIXING it successfully?

Roger