primary engine gauge options

[wslade2]

so, the old original mechanical square gauges for primary engine function (oil press/oil temp/fuel level/CHT) are iffy, or not functional or unreadable. Tachs, fuel flow and manifold pressure ok and I like them, want to keep them. Just curious what others have done. Looking at everything: rebuild/repair old, put in multifunction electronic replacements (like Electronics International), any other replacement options that are certified (are there some electromechanical modular options?). Without spending a mint...