Bulk agreements with individual information for signature

Hello,

I know Word allow you to make a mail merge of up to 300 emails however it generates one large file. I need to send out 300 individualized (different grant amounts and business names etc) to people for Adobe Sign. I have tried to use them Mega Sign option but it doesn't input the grant dollar amounts nor does it allow me to enter the same name (Column from CSV file) more than once in an agreement. I'd appreciate some clarity or ideas on how to go about this. Thank you.