I'm guessing you are a fan of the 445 spectrum and your budget is around 300USD.
For that I recommend you to go for the
Copper Diode Option
Copper Extended and Tampered Heatsink
At 1.4mW , the heat generated by the diode needs to have an effective mean of dissipation to maintain its service time.
You can also use some Thermal compound to fill in the microscopic imperfections between the contact surface so as to improve the interfacing of heat from the diode to the host. (Better heatsinking is always a plus) You don't necessarily have to buy from Survival Laser on that one, plenty of other options out there
Depending on what you want to do with the laser you can also switch for different optics.
For example, for long ranged beam shows , you'll want a 3 element AR coated lens.
For short ranged burning , you'll want a G-series lens for minimum power loss during collimation.
In the end , there are plenty of options , all that matters in the end is what do you want from the laser and how deep is your pocket