Need old CSHL E. coli strains

[Michael R. Frank]

I'm teaching a genetics course, and later this semester I would like 
to use some of the bacterial genetics exercises in J.H. Miller's 
"Experiments in Molecular Genetics" (1972, Cold Spring Harbor Labs 
Press), but I am having a difficult time finding the strains listed 
in the book. I am interested in doing the  interrupted mating/time 
of marker entry and gradient of marker transfer experiments, which 
use the strains CSH 61(HfrC trpR thi), CSH 62(HfrH thi), and CSH 57 
(F-). 

Do any of you either
A) Have these,
B) Know where they can be found, 
or 
C) Have some different strains which would fulfill the same purpose? 

I have already emailes CSHL, the Yale stock center, ATCC, and JH 
Miller. Only ATCC has replied, just saying they had no 
crossreference for CSH strain designations.

Thanks for the help.
Michael R. Frank
Dept. of Biology
Lake Forest College
555 N. Sheridan Rd
Lake Forest, IL 60045-2399
847-735-6044
email: mrfrank at lfc.edu