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You're looking for a transciever. >>
Danger Will Robinson. Danger!
You really need a repeater (hub) to go from 10 base 2/5 to 10 base T.
The tranceivers are not enough. An AUI crossover to connect them was not an option.
The tranceiver had a transmit pair, a receive pair, a colision pair, and +12 and ground.
At a minimum, crossing xmit and rcv, and rigging +12 would be required. Never heard of anyone trying it, however.
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Some 10BASE-T hubs have a thin Ethernet port built in >>
I have one hidden under the floor of the lab, if you are feeling nostalgic.

It is really the easy way to do this.
Doug