Small cock and wife desires a dildo option

My wife has finally decided to put me in chastity. I know there are a large number of devices on the market but I’d like some suggestions. My dick is very small. Barely two inches flaccid and three inches when erect. I think I could research a device myself but my wife has two other requirements. She would like a Cage that is metal (so she doesn’t have to look at my dickie) and, most importantly, she wants something that she can attach a dildo to. She doesn’t want a large dildo. Just something big enough to give her pleasure in either hole. She’ll forego the metal Cage if need be. Most important to her is the dildo. She doesn’t have a lot of lovers and sometimes my tongue just won’t do. Any help from those in the Lifestyle would be appreciated.