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I am not a 100% sure this is the right place to ask this, but I couldn't figure out another, more appropriate community.

I am designing a PCB for a product, which will have a tactile switch. The PCB will be placed in an enclosure, and I want the button, on the device samples I'm making, to look something like the power button in the image below:

I need a low profile/height switch at right angle, so I will be going with one of these types: https://www.e-switch.com/product-catalog/tact/product-lines/tl3340-series-smt-sub-miniature-tactile-switch#.V-Mql5MrIck OR https://www.e-switch.com/product-catalog/tact/product-lines/tl1014-series-micro-miniature-right-angle-smt-tact#.V-MqtJMrIck

Also, I plan to use one of the off-the-shelf button caps available on mouser/digikey. Example:http://www.digikey.com/product-search/en?mpart=1WD30&vendor=882 (image below)

The problem is that I cannot (rather do not want to) commit/finalize to a final enclosure design right now. The final enclosure could have a gap (unknown now) between the tactile switch actuator on the PCB and the side panel/edge. Hence, I need a solution to be able to, reliably, bridge the gap between the switch on the PCB and the button cap one the panel. I would loved it if I could find low height switches that come with add-on accesories for actuator extension or caps. I searched for tactile switch actuator extenders, but none of the results seem suitable for these low profile/height miniature switches.

What are some solutions/suggestions to this?? SHould I use some way other than the cap mentioned above???

I am looking for a solution that is NOT just a flimsy hack. I want something that is kinda sturdy. Also, this is for more than one device, I want to do this for the ~10-15 samples I'm making. (Also, I understand finalizing my enclosure is the obvious one, but please understand that I do not want to do that right now.)

Also, would like to highlight that I need a 'low height' (less than 4mm tall) switch. And that where the difficulty lies. Otherwise there are tactile switches with long/variable length actuators -- but none that I could find are short (<4mm) with long actuators.