5 proper seatbelts in a Disco 1

I am a lapsed Land Rover owner- owned a Disco 1 a few years ago.
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My kids would love me to get another one, but the reality of it is that there are 5 of us in the family, no Disco 1s have 5x 3 point seatbelts.

Is there and way of getting 5 full seatbelts in a Disco 1?

Obviously Disco II is the easy answer, but the sheer amount of stuff to go wrong on a Disco 2 scares me!

Thanks for replies- must be other people who have this problem!

d2 seats in a d1 has been done before but its not a straight swap,a lot of fabrication need to be done as they d2 seats are anchored in the floor.

Go on google pics and you will see the difference

Thanks for reply- so it is possible, but a pig of a job?

No way of adding 5th belt to existing seat?