I went ahead and ordered the stock Mitsubishi shocks from parts.com, making sure to select "adjustable rate" version and included my VIN. Parts arrived with official Mitsubishi tags and stickers and were indeed the OEM "adjustable" replacements. With shipping, my bill was around $275.00 and I retain the ability to change the settings on the console.
Front Group
http://www.parts.com/parts/1999/MIT...ubgroup=SUSPENSION COMPONENTS&component=Shock
Rear Group
http://www.parts.com/parts/1999/MIT...ubgroup=SUSPENSION COMPONENTS&component=Shock
Front Group
http://www.parts.com/parts/1999/MIT...ubgroup=SUSPENSION COMPONENTS&component=Shock
Rear Group
http://www.parts.com/parts/1999/MIT...ubgroup=SUSPENSION COMPONENTS&component=Shock