Unsupported as older builds of the software is there might be still be links to older builds of ReShade posted in the 3.0 release topic but yeah the older presets for 1.x and 2.x won't work with the current version of ReShade so this question comes up every now and again due to well 3.0 has several improvements but there's limited backwards compatibility unless you know enough yourself to rewrite these older presets.
(I know I couldn't do it without a lot of trial and error for example.)
EDIT: That's perfectly understandable by the way regardless of if you had to rewrite the shader file itself or just copy the settings from a preset into 3.0 if it has all the shaders, the in-game GUI can be extremely useful but for those looking to just copy some files over and be done with it well having to go through unfamiliar editing of the files that's not going to be very popular. (Even the preset creators themselves might not be too pleased with having to re-do the work in 3.0 or might have moved on to other games entirely.)
I know, I was just explaining things a bit but I don't have any direct download links myself for early versions of ReShade though if it's not posted on these forums already many of these older presets did include the .dll files too so that could be one method.
I think the idea has come up a couple of times of a archive for older versions but if I remember that correctly I don't think Crosire was interested in it.