If I've assimilated the information correctly, it would appear that there might be a couple of options for producing a "ghetto blue Alps" switch.
Namely, as summarized by E3E, do a "click mod" on the tactile leaf of either an orange Alps or an undamped cream/ivory Alps. The result might be getting somewhat close to the sound/feel of blue Alps, but the modded orange would be lighter and the modded cream/ivory would be heavier.
BTW, there are at least two methods recommended for the click mod. Chyros favors clipping all 4 tabs,
https://deskthority.net/review-f45/how-to-click-mod-alps-switches-t14099.htmlwhereas njbair suggests clipping only the top two -- the tabs near the apex of the triangular cross-section formed by the two planes of the leaf.
https://geekhack.org/index.php?topic=79539.0However, as Chyros has pointed out, there were a number of subtle changes made by Alps in the development of the blue switch from its predecessors. Moreover, the sound and feel of any Alps switch is dependent not only on the internal characteristics of the switch (which might include some elusive lubricant as well as various hardware components of the switch), but also the properties of the keyboard in which the switches are installed.
Therefore, we cannot expect to find a simple path for transforming a non-blue Alps into a blue Alps. I suspect that discovering the secret(s) of what makes blue Alps sound and feel as they do will prove to be nearly as problematic as determining what makes a Stradivarius violin sound the way it does (which also depends on having the violin played by an excellent violinist).
Nevertheless, there may be some relatively straightforward modifications of "lesser" switches that will prove close enough for those who prefer not to wait for a genuine blue Alps board to turn up at an affordable price. Moreover, many of us get along quite nicely without blue Alps switches!
