Wood used for type high

Here U.K we are using, (just for starters) Boxwood, Beech, Oak, Rosewood, and more, but usually in *end grain* form, for Poster type, reproduction experiments.?
WHEN, we can source MAPLE! from our local Bona Fide, traditional Cabinet Makers, @ a price, we have it put through, a planer thicknesser, to the metric equivalent of .854” (point eight five four, plus/minus .002” thou,) accepts 1 thickness of D.S.A. and .064” plate/cut etc. (apologies if plates/cuts are different thickness, Stateside) works well,
even on a H/berg Platen, having fed a double, it (Maple) along the grain, in plank form, appears to be indestructable.!!!

BUT, N.B. although most of the hardwwoods, here, are few and far between, we only try to acquire, Naturally dried material, artificial/rapidly Kiln Dried, never seems successful, perhaps better in a temperature and humidity controlled W/shop. but who has.?
In answer to the original question, would seem, no really cheap option, supply and demand etc, but Swedish Multi Ply/Multi layer @12 ply, for example, made up to type high inc, cuts, is a fair substitute.
In our museum Print Shop, Amberley, Sussex U.K. there are several sets of 4 colour process plates, would have been used on a Heidleberg Cylinder for extensive runs, still virtually perfect on the Type High Guage, mounted traditionally, with bevelled edges and fine panel pins, but ALL mounted on Mahogany.

It’s common for the Printer at home to make do
With MDF and such, adhere stock ( thin card) to the bottom
To bring your cut to type height