Our Double Spot lights are as close to drop in as it gets, however with two Combo lights you get a whole lot of light aimed correctly for landing coming from both wingtips. Then when the tail is on the ground you have lights aimed for taxiing again coming from both wings, so you can still see down both sides of the runway and taxiways.
Your existing light bracket can be removed from the wing with just four screws, and you can then easily enlarge the hole to suit the Combos out on the bench.
You would need to upgrade your breaker to a 10 amp with two Combos.
I've never seen strobes in the leading edges either! It would be great for extra recognition, but I note they also nicely block ~20% of the light coming from the landing lights! I'd remove the extra strobe heads and keep them on the shelf for when the wingtip strobes fail.
A much better solution for improved recognition is to wigwag the landing lights instead. The apparent movement
of the light from wing to wing is the eye catching part and is more visible during the day than a short strobe flash.
We can help you out there with either the Wigwag Module
or the Wigwag Switch