"best" polymorphic CA repeat promers

[Varyc]

Hi all,
Can anyone suggest one or more pairs of PCR primers that :
1. result in amplification of a very highly polymorphic human genomic locus (>10 alleles?).
2. give allele size differences that are easily relolvable by native (preferred) PAGE
3. Possess better than usual sensitivity ie would detect a small amount of one DNA source
(genotype) against a background of excess second genotype.

Thanks in advance for any help.

Cal Vary