I dont know where you could get them..but i know there are shakes out there that are full of carbs and and stuff to make you gain weight...they use them alot of times on old people because they cant eat alot and lose lots of weight...try asking your doctor about them....i dont know
eat small meals all day long...and like wake up in the middle of the night for a mid night snack...i know i am not encouraging healthy eating habits...but i guess id rather you eat at night then have an ED...or a tube sticking down your stomach...Eating at midnight lays in your stomach and you dont burn the food...thats why they tell alot of dieting people to stop eating after 6
eat alot of chips...and snacky items they dont fill you up so fast...and are big in carbs...
i am really sorry...all the ways i can think of to gain weight are not exactly the most healthy....but i just wanted to help...good luck ....pm me anytime (((((((((((hugs if they are ok with you)))))))))))