Scale Aircraft Conversions specializes in white metal replacement parts. Its line of replacement landing gear has been expanded to include a set for the 1/48 Bae Hawk and it can be used with all variants of that kit.
The set includes 7 parts with the following breakdown two main landing gear struts, plus actuator arms for the above and a tail wheel. The parts are finely molded in white metal. These parts are drop-in replacements for the plastic parts.
I should say that these parts are more than just drop-in replacements. Some of the white metal parts actually comprise the equivalent of a few plastic parts, so you get an easier job of assembling the landing gear as you have fewer parts to deal with. In addition, you don’t have to deal with cleaning seam lines.