I got one with brackets for my 95 2x EB from either JC Whitney or carparts.com (JC Whitney online only site). I just searched for an 88 on jcw.com and did not see one but carparts.com had one for $58 with brackets, seems like good price to me. Adding the stabilizer to my van improved steering feel, but adding rear sway bar made a huge difference in handling.
1995 E250 2x SMB White Contempo Top Custom SMB Interior 5.8L (351) 69K miles
Added Propane Tank & Propex HS2800/20 Gal Fresh inside/20 gal gray underneath behind axle
2.8K Onan/Porti Potti Shower Area/110V Digital Oil filled Electric Radiator Heater/Dynaglo for backup
Hankook Dynapro ATs 225/75-16 LRE
New to me 10/2008 - 2nd owner