Where can I get a Hydraulic clutch for 383 dart

Here is what I have 68 Dart 383,4 speed,TTI headers,lakewood bellhousing.The Z bar linkage WILL NOT fit THANKS ALOT TTI....Where can I get a Hydraulic clucth kit for what I have?Kiesler Trans sell a kit for $650. I would like to find a kit cheaper.Anyone have any ideas? Thanks for the help....