Flange insert for real bubee

Hi mga momsh, I've been using a real bubee double electric breast pump before nakaka 4-9 oz ako per session of pumping tho masakit po talaga after. But now po napansin ko nagdecrease yung milk na napa pump ko naging 1 to 4 oz nalang po. And masakit din po nipples and area of areola ko meron syang parang lump na masakit pag nahawakan. I've decided to measure my nipple for the correct flange size and I found out na the default flange which is 24mm is quite big for me and I was wondering instead of buying new flange set( pricey po kasi masyado, mas mahal pa sa breast pump ko) could I just buy an insert for my real bubee and if meron po any recommendations po ng brand na compatible? #1stimemom #exclusivepumping ##breasfeedingmom