93 1.6 eunos roadster sealed headlight....

hello, im dave and my lady recently got a eunos roadster. its going like a dream but the front right headlight has an intermittent problem. it works if you give it a slap but the high beam works as it normal. i have changed the bulbs on an mx5 before b ut this one is sealed. 3 q's ; can unsealed units be put in instead for ease of bulb change? would a pair of sealed units cost an arm and leg? and three i got a number of practical mx5 ireland off the w3eb, hs anyone had any dealings with them? are they good? thats about it for now. looking forward to meegting you all and kick some tires.
thanks in advance
dave and lou
thanks in advance
dave and lou
