fwiw, i went thru this same drill.... clutch had 160k and had plenty of life left in it.
the slave cylinder required the new line and adaptor at a rediculous price, if you take the part # from the old one you can buy it on ebay for about $40, says it is for a VW Jetta, my problem turned out to be a cracked pivot arm and it was flexing under load, suggest you inspect it carefully
