Linda picked out a 27 inch GE model (JKP15BABB) that is the same size as the previous one, so I can just pull the previous one out and put the new one in.
Unfortunately, the mechanical controls that the old one used are no longer available; now we have electronic controls. The installation instructions say that the circuit boards can overheat if there is not enough outside air flow, so I had to cut an opening under the oven into the drawer below the oven. $660.27 from Bettis Appliances.
Update: June, 2019. The top (broil) heating element burned out. Spectacularly. We were trying to cook some salmon, and suddenly there was a burst of light, sparks and flames. The element burned for some time, and eventually a section about an inch long fell off. Turn the power off (at the circuit breaker). Let it all cool overnight. Then remove two screws, unplug the broil element, go get a replacement piece -- WB44K5009 Broil Element $61.11, plug it in, put the two screws back that hold it in place, turn the power back on, and everything (seems) to work again.
