Methylation, Ltd., offers a number of different kits that focus on DNMT and DNMT/DNA interactions. Here is a summary:
ICM kits: These are DNMT isoform specific kits that measure endogenous binding of DNMT (1,1b, 2,3a,3b) to genomic DNA. This is equivalent to a methylase based footprinting experiment and is described in detail by Liu et al., (2003). A summary of the ICM kit is available on-line as well: ICM Summary page.