Can you use an LED Bayonet bulb in standard 40 or 60W bayonet fitting?
I've not dealt with these myself (but you made me curious): a simple search for B22d LEDs turns up plenty of results; e.g. these Osram's on Amazon. You haven't said what mount these "Bayonet fitting" is, but I assume it's the common one, i.e. B22d. You can find a full list of Bayonet fittings on Wikipedia, which also tells you how they're identified (usually by base measure).