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atz
Stronglight have 44, 46, 48 and 49T outer rings to fit 4-bolt Ultegra/105.
Their smallest inner ring is 34T though, which I think is a limitation of (non-oval) chainrings with 110 BCD. So if you want 32T or smaller you need either an oval chainring or a different crankset (e.g. FSA, GRX).