Need bouncer help/suggestions!?

k, my daughter is 4 months, 25 1/2 inches. she is a big girl. unfortunately she is outgrowing her bouncer. most of the time that is the only way to get her to go to sleep. its pacifier, swaddle, rock in bouncer. her sesame street one broke so we took the top of of it and put it on the fisher price pretty pink bouncer. the sesame street one we had to use because that is the only one that's big enough we could fasten her in. the other ones the straps are too small and now her feet are hanging off the side. i have a few questions. can you recommend a big bouncer that would fit her and last awhile? she also needs that rocking motion to go to sleep. (she also has reflux, that's why she falls asleep in this position)shes trying to sit up but cant yet, so my next question is what happens after the bouncer? where would she sit? i have no idea what to do after she outgrows this bouncer. help!