In need of itty bitty driver

I've been thinking of building a very slim pen. Something to run on 2 AAAAs. Of course this will require a narrow driver. I saved a driver from a cheap 5mw-ish Alpec pen. But I have higher power ambition. I'd love to use something green like a PL520.

Here's a few pics of this miniature at around 7mm. Could this PCB be turned into something to drive a PL520?

Thanks folks!!!

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