Hi Naushad, I'm using B44.2 Lipo trays. They are almost perfect (can be mounted with existing holes in chassis but makes it hard to use rear lower body mounts). They also work on Lazer ZX and ZXR according to other people.
Here is my new project where I use those trays my self. I made my own fasteners but you could use Associated standard plastic ones. One pic with the trays only and one pic with tray and fasteners:
