01 hydro booster
 

i tore down the booster to replace it and when i separated the master cyl from the booster. the seal that is there just fell apart.
where can i find one on a sunday. i found the part number.
rock auto has it but i need it today. so far the only way i get it today is if i buy the master cyl.
[coffee]

No idea. But now it's Monday. Did you find it at Oreilly/Advance/AutoZone?

And for reference, what's the part number?