This build, though not complex is very fiddly to do as there is not much room to fit everything in, but if you want to have a go here is the information you will need.
This is the General arrangement that I worked from.
List of parts:
Flip-top lighter of your choice (I used a Star lighter from ebay).
Blu-ray laser diode (PHR 803T)
Aixiz module (front end and lens only, Outside diameter turned down to 10mm).
Small block of aluminium (heatsink/optics holder).
Driver (I used the low range Rkcstr driver, google is your friend).
Push button (I took one from a broken DX green laser)
Batteries (GP 10A [9v 38ma/hr]).
Small pieces of scrap brass sheet, for contacts and springs.
Small piece of plastic for mounting driver and insulating battery contacts.
Various colour insulated single strand copper wire.