The kerosene equivalent generators for the T44 and T66 were the TK44 and TK66 aka T44K and T66K. The DL postfix meant Double Life and was for nickel plated generators.
The TK44 and TK66 are not available any more but the replacement for the TK66 as used on 241/A/G is the common 201 generator.
Replacements for the TK44 are not made by Coleman but the tube of a T44, which is just a common 220/228 generator, can be used in conjunction with the jet and needle of a common 200A generator.
A brass or aluminium spiral from a 201 generator completes your new TK44.
-Phil