Steering Rack Part Number Compatability. 97 1.6 Passat B5. AHL.

Hi,
Need a steering rack for my B5, AHL Engine Code. Have managed to find out that it is a ZF Type rack and have the Part No. as 8D2 422 (052J.) There are some variations on this number on the last four digits/letters i.e (05JX) and (069C).

Have seen for sale a couple of racks with Part Nos. 8D2 422 (066K) and 8D2 422 (066M).

Anyone know what these variations mean and if these would be compatible with my Passat,

Any help appreciated - Thanks.