Unless you are going for an on site fire team, you should only be looking at covering small spills, small bunded fires, etc as with a polar solvent you are looking at at least trolley extinguishers if not hose & foam branch.
Although Alcohol Resistant Aspirating Foam Branchpipe extinguishers, usually FFFP-AR these days rather than AFFF-AR, are available commercially the impressive fire ratings on them of 183B or 233B are on standard Avgas test fires and their capacity on polar solvents is much less.
The last (in fact only) manufacturer to do proper test fires on polar solvents with extinguishers was Angus in the 70's & 80's when they made their own extinguishers (before switching to buying in Britannia Fire extinguishers in the early 90's).
A 9 litre Aspirating branch extinguisher with Angus Alcoseal FFFP-AR attained a rating of 233B on a normal Class B fire, but on Polar Solvents only managed a 34B rating - even with 'AR' compounds a far greater application rate and volume is required to maintain a stable foam blanket, limiting the efficacy of portable equipment.
Even at 60% Polar there will be an adverse effect on foam blankets, and the exact type of alcohol matters as foam destruction rates differ widely based on exactly what is involved.
Proper training in the use of these extinguishers is needed as well - a video or a extinguisher training gas rig will not be enough to develop the skills for proper foam use on in depth Class B risks - anything more than a shallow non running spill requires technique, particularly if using Foam Branchpipe extinguishers.
You can of course fill the standard non aspirating spray extinguishers with 'AR' compounds, but this is a waste of time as the required application rates for this type of foam application method are even higher and the fire rating plummets even more to the size of fire where you might as well save some money and use an off the shelf powder or CO2 extinguisher.
