being so glad I'm able to answer a question ... ;-)
Both Multicontrast Classic and MC Premium are compatible to every kind of filtering with the Ilford standard.
Sorry but I only have found the german version of the data sheet at http://www.agfa.com/de/photo/pdf/products/P-SW51-D2.pdf , which confirms this theory
#00, #0, #1/2, #1, #2, and #5 works for me. The rest are repetition. I'm using the Zone IV cold light head. Result may differ from yours. But generally the lower grades are usable.