High-speed blower not working

My van has the manual climate control panel not the automatic one. I replaced the blower motor fan assembly a few weeks ago. The old one had noisy bearings. All was fine until I lost the high-speed fan setting. I assumed it was the resistor. I researched for the part and while the Toyota parts website says it is unavailable, the aftermarket lists them for both front and rear blowers under different part numbers for the 2011 model although from the photos they look identical. Problem is I cannot for the life of me locate anything near the blower that looks like this part. The part looks like it would fit into an air duct as the flange of the resistor is lined with foam insulation. I removed the glove box and the housing behind it to see better, but no sign of anything like it. I also was amused that I am not the only one looking for a resistor location to no avail, as the Sienna chat forums have no answer to this question. Without paying for a big service manual or taking chances with a shop that wants to tear the dash apart I though I would try you first. Thank you!