Creation of Simple ISAM (BTRIEVE Type) for Pascal

I'm an old fashioned programmer that requires a simple Database program written in Pascal (Lazarus Preferred) that will perform simple Read / Write / Update to a .dat file that has a .index file with multiple index files allowable. If you recognize this from Btrieve, you probably know and understand what type of project this is. I don't need or want SQL. I would like it to be self contained and I do not even need record locking (unless it is easily accomplished) Format would be storing simple datasets in simple datamodules. I do not want Interbase, Firebird, PostgreSQL, SQLite. I would like a simple component for the "table" actions. This is for my own use to convert older Delphi Programs. I would like to turn the clock back. ISAM (an acronym for indexed sequential access method) is a method for creating, maintaining, and manipulating computer files of data so that records can be retrieved sequentially or randomly by one or more keys. Indexes of key fields are maintained to achieve fast retrieval of required file records in Indexed files.