Results of recent search for available translation technologies:
1. CD4050 hex buffer can run from 3V to 18V but accepts higher than VDD level on the inputs. However, at 5V requires at least 3.5V for high level inputs. datasheet here
2. SN74LVCC3245A is the dual supply transciever commonly in use here. Comes in surface mount only. A side must be between 2.3 to 3.6V, B side must be between 3V to 5.5V. Control lines are on the A side. datasheet here
3. SN74LVC4245A is another dual supply transciever using LVC-only technology. Very similar to 74LVCC3245A except that on this one the A side is locked to 5V and the B side is 3.3V. DIR and OE are on side A. datasheet here
4. It turns out that there's a SN74LVCC4245A, which has the A port being the 5V side, but the range on the B port goes from 2.7V to 5.5V. This might be the one that I thought I was using when building the breadboard. datasheet here
5. The SN74LVC245A runs at 1.65V to 3.6V but can handle input levels up to 5.5V. datasheet here
6. Similarly, the SN74LVC244 runs at low voltages and can handle 5V inputs.
7. The 74HCT244, if run at 5V, requires only 2V as an input high level (consistent with TTL characteristics). datasheet here
8. The CD40109 is a low-to-high translator, but is only 4 to a package.
9. The CD4504 is also available in DIP, is a hex buffer that accepts extremely high input voltages above it's VDD, but it's not clear if it can be run at 3.3V
10. here's a fascinating forum thread where a bunch of other ideas, including the CD4504 are discussed.
